Method for improving immunity in shrimps

Abstract

The invention discloses a method for improving immunity in shrimps, by administering an extract of cocoa rind to a shrimp body to improve immunity of the shrimp body. The extract of cocoa rind is obtained by extracting a dried sample of cocoa rind by an aqueous ethanol solution with a concentration of ethanol being 90-98%. The dried sample of cocoa rind has a water content of 2-5%.

What is claimed is: 
     
       1. A method for improving immunity in shrimps, by administering an extract of cocoa rind to a shrimp body to improve immunity of the shrimp body, wherein the extract of cocoa rind is obtained by extracting a dried sample of cocoa rind by an aqueous ethanol solution with a concentration of ethanol being 90-98%, wherein the dried sample of cocoa rind has a water content of 2-5%;
 wherein the extract of cocoa rind is administered to the shrimp body by injection at a dosage of 0.6 μg/g of the shrimp body, or the extract of cocoa rind is orally administered to the shrimp body at a dosage of 120 μg/g of the shrimp body per day. 
 
     
     
       2. The method for improving immunity in shrimps as claimed in  claim 1 , wherein when the extract of cocoa rind is administered to the shrimp body by injection, the extract of cocoa rind is injected into the ventral sinus of the cephalothorax of the shrimp. 
     
     
       3. The method for improving immunity in shrimps as claimed in  claim 1 , wherein when the extract of cocoa rind is orally administered to the shrimp body, the extract of cocoa rind and a feed are co-administered to the shrimp body. 
     
     
       4. The method for improving immunity in shrimps as claimed in  claim 1 , wherein when the extract of cocoa rind is orally administered to the shrimp body, the extract of cocoa rind is administered to the shrimp body for 7-28 days.